Respirator



Jan. 5, 1937. N. SCHWARTZ RESPIRATOR Filed Nov. 16, 1935 VINVENTOR. l v/Y/l THA/Y SCHWARTZ ATTORNEYS Patented Jan. s, 1931 UNITED STATES PATENTOFFICE 3 Claims.

This invention relates to iilter type respirators and comprehends animproved respirator which includes either an inexpensive, but eective,ilter element which may be discarded when uni'lt for .5 further use inlieu of a new element to replace the same, or a washable lter elementwhich may be cleansed and reused., l l

More particularly the invention resides in an s improved respirator ofthe'indicated character 1,) which includes a substantially cup-shapedcover element of a size to enclose the nostrils and mouth of the wearerand means with which said element is detachably associated for holdingthe same in applied position and for exerting a pres.-

sure to impinge the marginal portion thereof 4against the face so as toprevent leakage and in-` sure the pasmge therethrough of all of the airinhaled by the wearer. l, With these and other objects in view, the in-'0 vention is set forth in .detail in the following specincation andaccompanying drawing wherein a preferred embodiment is disclosed, whilethe apmnded claims cover variations and modifications falling within thescope of the invention.

In the drawing:

Fig. 1 is a mrspective view of the improved respirater in appliedposition.

Fig. 2 is a vertical sectional view therethrough on an enlarged scale.

Fig. 3 is a perspective View of the nlter element removed from theholder.

Referring to the drawing by characters of reference. ill designates anlter element preferably constructed of sheet material which is` sofash- 33 ioned as to present a cup-shaped structure of a me to enclosethe nostrils and mouth of the wearer with the maior portion thereof inspaced relation to the face except at the marginal portion thereof. Thematerial may either be molded a into this shape or, as illustrated,notched at lli with the notched edges Joined. by aline of stitching iito impart the general cup-shape form thereto. Il' desired, the' marginalportion may be covered with a; strip of air impervious material L; it,such as rubberized fabric which is attached thereto by `stitching I4 toprovidev a nonirritating covering for contact with the face. l

In order to providel means for holding the lter element in appliedposition and for exerting at 50 the marginal portion thereof, a pressureto seal the same against the face, a member is utilized which may be ofany desired type to perform the intended function. However, asillustrated, the member or holder consists yof a face piece i5conforming generally to that disclosed in my co- (Cl. 12S-M6) pendingapplication, Serial No. 44,694, led October 12, 1935. The face piece ormember i5 is constructed of molded vrubber and conforms generally to theshape of the face in the region of the nose, mouth and chin, andincludes a nose cover- 5 ing portion i6 having a lower horizontal wallil provided with a depending tubular boss i8, and further includes amouth covering portion i9. The rear margin of the face piece is providedin the region ofthe nose and chin with inwardly di- 1o rected angularlydisposed flanges 20 and 2l, the free edges of which flanges arerespectively contoured to iit over the bridge of the nose and the lowerportion of the lower lip, while the rear face of the lower flange 2l isadapted to contact with '15 the chin immediately below the lower lip.The face piece is also formed with cheek flaps 22 adapted for fiatcontact with the cheeks of the wearer throughout a substantial areathereof. The cheek apshave attachedthereto the ends 20 of a supportingband 23 for holding the face piece in applied position. VThe face piecein this instance is preferably provided with any number of air passagesit in addition to the air passage defined by the tubular boss i8. 25 Thefilter element iii "is applied to the inner or hollow side of the facepiece iiiand suitable means is provided for detachably associating thefilter element with the face piece, which means in thelpresent instanceis disclosed as strips of adhesive tape 25 which are adhesively`attached to tabs 26 formed at the upper portion of the lter element l!)the protruding ends of the tape strips 2E being adhesively connectedwith the `exterior of the face piece i5. When the hlter element is thusassociated with the face piece or hollow member i5, the respirator isdonned and the supporting band 23 causes the marginal portion of theface piece to exert a pressure against the marginal portion of the lterelement intoA 4@ impinge the same against ,the face of the wearer so asto seal said filter element at its marginal portion against leakage ofair therearcund.

In some instances, the filter element i0 Amay be made of an inexpensivematerial which may be l discarded when unfit for furtherl use in lieu ofa new element to replace the same, while in other instances the filterelement may be madev of a material which may be cleansed and reused.

Obviously, when the respirator is in applied 5o position, all of the airbreathed by the wearer mustl pass through the filter element so as toseparate therefrom any injurious. foreign matter such as dust, dirt orthelike., It will also be apparent that the lter element maybe readilysa changed or renewed by simply detaching the adhesive strips or otherequivalent fastening means from the face piece. It will also be observedthat due to the cup-shaped configuration of the filter element l0, themajor portion 'of the same will be disposed out of contact with the faceof the wearer except at the marginal portion and where vsaid marginalportion is provided with a covering strip I3, the wearer is relieved ofthe irritating nature of certain types of filter elements which are offelt, wool or equivalent materials.

What is claimed is:

1. A lter type respirator including a lter element adapted to enclosethe nostrils and mouth of the wearer and fashioned so as to be disposedin spaced relation to the face except at the marginal portion thereof, amember having air passages therethrough, said member overlying anddetachably associated with the central portion of the filter elementwith the marginal portion of the filter element extending therebeyond,and means connected to said member for holding the same in appliedposition and for exerting pressure to impinge the filter element againstthe -face of the wearer adjacent the marginal portion of said nlterelement.

2. A filter type respirator including a filter element adapted toenclose the nostrils and mouth of the wearer and fashioned so as to bedisposed in spaced relation to the face except at the marginal portionthereof, a strip of air impervious material secured to and extendingaround the marginal portion thereof and a member having airpassagestherethrough and with whlch/ said element is detachably associated toconstitute means for holding the same in applied position and forexerting a pressure to impinge the covered marginal portion against theface of the wearer.`

3. A filter type respirator including a substantially cup-shaped filterelement adapted to enclose the nostrils and mouth of the wearer. amember for holding the lter element in applied position and for exertingat the marginal portion of said element a pressure -to seal the sameagainst the face of the wearer, means for detachably associating thefilter element with the member, said means comprising adhesive strips onthe filter element having extending portio adhesively attached to themember.

NATHAN SCHWARTZ.

